import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../../../database/daos/promozioni_dao.dart';
import '../../../providers/database_provider.dart';
import '../../../database/database.dart';
import '../../widgets/empty_state.dart';

class PromotionListPage extends ConsumerWidget {
  const PromotionListPage({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final promoDao = ref.read(promozioniDaoProvider);
    final promosAsync = promoDao.getActivePromos(DateTime.now().toIso8601String());
    final theme = Theme.of(context);

    return Scaffold(
      appBar: AppBar(title: const Text('Promozioni')),
      body: FutureBuilder(
        future: promosAsync,
        builder: (_, snap) {
          if (!snap.hasData) return const Center(child: CircularProgressIndicator());
          final promos = snap.data!;
          if (promos.isEmpty) return const EmptyState(icon: Icons.local_offer_outlined, title: 'Nessuna promozione attiva');
          return ListView.builder(
            itemCount: promos.length,
            itemBuilder: (_, i) => _PromoCard(promo: promos[i], promoDao: promoDao, theme: theme),
          );
        },
      ),
    );
  }
}

class _PromoCard extends StatelessWidget {
  final Promozione promo;
  final PromozioniDao promoDao;
  final ThemeData theme;

  const _PromoCard({required this.promo, required this.promoDao, required this.theme});

  @override
  Widget build(BuildContext context) {
    final tipoLabel = switch (promo.tipoPromozione) {
      2 => 'Articolo Omaggio',
      3 => 'Listino Omaggio',
      4 => 'Omaggio a Scelta',
      5 => 'Omaggio Automatico',
      6 => 'Omaggio per Importo',
      9 => 'Sconto Quantità',
      _ => 'Tipo ${promo.tipoPromozione}',
    };

    return Card(
      margin: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
      child: ExpansionTile(
        leading: Icon(Icons.local_offer, color: theme.colorScheme.primary),
        title: Text(promo.descrizione ?? 'Promozione'),
        subtitle: Text(tipoLabel, style: theme.textTheme.bodySmall),
        children: [
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                _detail('Priorità', promo.priorita.toString()),
                if (promo.limiteQta != null) _detail('Limite Qtà', promo.limiteQta.toString()),
                if (promo.quantitaOmaggio != null) _detail('Qtà Omaggio', promo.quantitaOmaggio.toString()),
                if (promo.limiteImporto != null) _detail('Limite Importo', promo.limiteImporto.toString()),
                if (promo.dataInizio != null) _detail('Da', promo.dataInizio!),
                if (promo.dataFine != null) _detail('A', promo.dataFine!),
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget _detail(String label, String value) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 2),
      child: Row(
        children: [
          SizedBox(width: 120, child: Text(label, style: theme.textTheme.bodySmall?.copyWith(color: theme.colorScheme.outline))),
          Text(value),
        ],
      ),
    );
  }
}